Chrome，
QQ浏览器
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![北师大数学八上《2.6 实数》[石老师]【市一等奖】优质课](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2Fa5727e74d7b05c033c1335d54b7901943d6628dc.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：7 时间：2024-06-20简介： -
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![北师大数学八上《2.6 实数》[石老师]【市一等奖】优质课](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2Fa5727e74d7b05c033c1335d54b7901943d6628dc.jpg%40672w_378h_1c_%21web-search-common-cover)
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